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Re: Dinosaurs in April Discover Magazine
In a message dated 3/19/98 2:21:36 AM Eastern Standard Time,
> The idea however, is as old as the fossil finds themselves, and is quite
> possible. Some dinosaurs with high spinal struts quite probably fit into
> theory in question(Hypacrosaurus, Altyspinax, etc.),and Ouranosaurus "sail"
> indeed looks a lot like camel's or bison's hump. I am not sure about
> Spinosaurus - its "sail" is a bit different.
The article specifically mentions _Ouranosaurus_ as being a possibility,
and Bailey thought that the "hump might have forced _Ouranosaurus_
down on all fours with its head lowered like a bison's."
> The "true" sails of Dimetrodon and some other pelycosaurs are built
> lightly - obviously just to support a flap of skin.
Yes, the differences mentioned were that "Unlike _Dimetrodon's_ thin
bony spears, the dinosaurs' struts were flat and broad with swollen
tips like the ones found in humpbacked animals."